For Female Characters only. (I think?)

Every time I went to add or change meshes or textures in Data->Meshes->Characters->Hair, or Data->Textures->Characters->Hair, I would end up with a Uni-brow on any character with the "head part" eyebrow added on. So after deleting those folders for the fourth or fifth time it hit me; it's the game calling for a texture or mesh that needs to be in the hair file, but it's not there. So I opened Fallout Mod Manager, went to the tools, open the BSA Browser and pulled the vanilla textures and meshes from the game and installed. Problem Solved.

There is no esp here its just mesh and text. There shouldn't be any conflict unless you have another eyebrow labeled exactly the same as the vanilla version, in which case you should skip that, or keep both files.